Couple things:
1. That error means something went wrong on our end (you didnโt do anything wrong); if you hit the 3 dots at the top right and click โNew Chatโ that can sometimes resolve it
2. You can always re-deploy your changes at any time and share with friends, that should work fine
3. If you want friends to be able to edit the app, thatโs a feature weโre still working on
4. I noticed that youโre doing all this on mobile browser; you can add it to your home screen and it will feel more like a native app (in your browser hit Share -> Add to Home Screen)